Abstract
The dynamical Laue diffraction has been studied for a direct beam diffracted from a thin (∼3.5 cm) α-quartz crystal at the Bragg angles close to 90°. It is shown that diffraction occurs at Bragg angles up to 87°. The time-of-flight method is used to measure the time of the neutron presence in the crystal under the diffraction conditions. The time delay for a scattered neutron inside the crystal predicted earlier for the Bragg angles close to 90° confirmed experimentally. The effective velocity of the neutron propagation in a crystal measured at the incident-neutron velocity of 810 m/s and the diffraction angle of 87° equals (43±1) m/s. The result obtained confirms the possibility of increasing, by an order of magnitude, the sensitivity of the diffraction method of determining the dipole moment of a neutron at Bragg angles close to 90° predicted earlier theoretically.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 71, No. 2, 2000, pp. 110–115.
Original Russian Text Copyright © 2000 by Voronin, Lapin, Semenikhin, Fedorov.
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Voronin, V.V., Lapin, E.G., Semenikhin, S.Y. et al. Direct measurement of the delay time for a neutron in a crystal in the case of the Laue diffraction. Jetp Lett. 71, 76–79 (2000). https://doi.org/10.1134/1.568284
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DOI: https://doi.org/10.1134/1.568284